The starter isnt a year old.
I can crank the motor easy, shut it back off, then struggle to restart it. Otherwise I was thinking heat soak originally.
I plan to replace the knock sensor being the easiest think to start with. Then verifing base timing.
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A starter pulls a lot of amps. It is a very high reduction motor.
The "s" wire going to the solenoid gets hot as hell the first time you crank it.
That heat spikes the resistance in the wire immediatly.
The starter being less than a year old doesnt mean a thing.
Especially if its an aftermarket.
But, all GM parts are aftermarket.
AC Delco doesnt manufacture anything and they havent for several years now.
AC Delco is the marketing division for GM parts.
Most of those parts are now branded under the Delco name but are manufactured by Delphi.
Delphi manufactures parts in at least 24 different countries.
Hardley any of those parts are made in the US.
Just enough to stick a made in usa flag on the box.
Delphi will show you a picture of headquarters in Michigan.
Its just an office.
They dont show you the devastated weed grown manufacturing plants where nobody works anymore.
Its all Chinese crap and you cant assume anything.
Oddly enough, quite a few Duralast parts are made by Wells in Wisconnsin.
But Wells is owned by the Japanese.